Electrical Studies of the Loma Prieta Fault Zone

本研究将利用大地电磁测量和自电位测量研究洛马普雷塔地区下地壳流体的影响。这些大地电磁测量的三维解释将详细说明断裂带周围电导率的变化。自电位测量与流体压力变化有关。结合绘制断裂带下地壳部分的电阻率变化和流体压力变化，将为进一步了解Loma Prieta地区的地震周期提供重要信息。这项研究是国家减少地震危害计划的一个组成部分。

This research will study the influence of lower crustal fluids in the Loma Prieta area using magnetotelluric and self-potential measurements. Three-dimensional interpretation of these magnetotelluric measurements will detail the variation ofj electrical conductivity around the fault zone. Self-potential measurements are related to fluid pressure variations. The combination of mapping the resistivity changes and fluid pressure variations in the lower crustal part of the fault zone should provide important information pertinent to furthering our understanding of earthquake cycles in the Loma Prieta area. This research is a component of the National Earthquake Hazard Reduction Program.